Questions tagged [avr]
AVR is a 8- and 32-bit microcontroller core developed by Atmel. AVR was chosen as microcontroller for the first generations of the popular Arduino SBCs.
1,910
questions
0
votes
2
answers
143
views
AVR ATmega328P if statement wrongly executed after reset
I have simplified the listing to bare minimum where I can still observe this behaviour.
When this program is running, it works as expected. Button press causes LED to show up.
The problem exist on ...
- 940
0
votes
1
answer
47
views
How to increase the Atmega32A input output pins
I’m using ATmega32A to control a system which have a 30 outputs and 30 inputs. The issue is that the ATmega32A have only 32 DIO pin which can be use as input output pins.
So how can I increase the ...
0
votes
1
answer
82
views
ATTiny85 won't reprogram
I am using a tiny AVR programmer to program code specifically this one, https://www.amazon.com/dp/B00B6KNJRY?psc=1&ref=ppx_yo2ov_dt_b_product_details , I can successfully upload code onto a blank ...
- 13
2
votes
1
answer
117
views
AVR32DA VIH threshold
I am looking into using an AVR32DA48 MCU for a design. The MCU will be powered at 5V and needs to interface with an IC at 3.3V. The IC is 5V tolerant and I am trying to figure out if a level ...
- 153
0
votes
1
answer
80
views
How to identify all AVR MCUs (ATtiny and ATmega) that feature a factory-programmed unique ID
On Microchip's site, the "parametric search" table for microcontrollers does not have a filter column to select the models that feature a unique ID. Is there a way to list (enumerate) all ...
- 2,153
0
votes
1
answer
42
views
Can WINC1500 be used with SPI for connecting to a router?
I'm planning to buy the WINC1500 WiFi module. I have heard that it contains a SPI layer, which can be used for telling the WINC1500 to connect to a router.
But as I can see in the documentation, I ...
- 1,324
0
votes
1
answer
52
views
Ohmic load on AVR's SCK?
I have an ATTINY13, and almost all pins are used (only PB2 is free).
What I need to add is a controllable ohmic load, which I believe best way to add is with an N-channel MOSFET, similarly with this ...
- 969
0
votes
2
answers
79
views
Can I treat the USB controller in the ATMEGA8U2 as seperate from the rest of the microcontroller?
I'm working on a project that runs on a battery, but can be connected to a computer for a serial connection/charging. In the documentation it lists an example of a bus powered USB controller with ...
1
vote
3
answers
300
views
ATMEGA328 out of memory, but avr-size reports I still have a lot of space
I have a program written in C. I have 390 byte array defined and a long string value consisting of around 475 bytes. Now I hit a problem if I add more characters to the string value, around 30 bytes, ...
- 481
4
votes
2
answers
1k
views
Transmitting from PC via USART to MCU working but very slow
I am sending a small 16-Bit RGB BMP image file from my Linux PC via USART (with a loosely wired USB to serial converter) to an AVR ATmega MCU sitting on a breadboard, running at 8 MHz with the ...
- 551
0
votes
0
answers
99
views
Graphical LCD With Atmega64
I have ATMEGA64 and LCM240128, The wiring is as below:
And my code is ( I'm using codevision):
...
2
votes
1
answer
379
views
ATmega64 custom board is not programming
I have designed a custom board for ATmega64 as below:
It's the first time I want to program it, and I get a "chip enable program error". I can program ATmega16 and ATmega8, but for ATmega64 ...
1
vote
1
answer
94
views
ATMega328p wakes immediately after sleep
I'm having issues with my current AVR-C project that runs on an ATMega328p. After issuing the sleep command the chip wakes up again immediately.
I want to wakeup with an external interrupt, but while ...
1
vote
2
answers
478
views
Assembly: AVR Studio alternatives for Linux [closed]
I had been using using AVR Studio on Windows to write assembly code for my MCUs (mainly for atmega8515) for a couple years. However, recently I transitioned to Linux and turns out there aren't any ...
- 21
4
votes
1
answer
649
views
AVR code disassembly - what is this code doing?
I have read and disassembled the code from an Atmel8 microcontroller from a faulty oscilloscope.
This is the start routine:
...
- 199